Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis

Very low permeability soils and rocks may act as actual semi-permeable membranes and also have the potential to swell if they contain smectite clay minerals. This study extends mixture coupling theory for unsaturated, very low permeability swelling rock, based on non-equilibrium dynamics and Biot�...

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Main Authors: Chen, X., Pao, W., Thornton, S., Small, J.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.25642 /
Published: Elsevier Ltd 2016
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964466928&doi=10.1016%2fj.ijengsci.2016.04.010&partnerID=40&md5=10663106f8133b9b923f7be1e1ea2137
http://eprints.utp.edu.my/25642/
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spelling utp-eprints.256422021-08-27T09:39:37Z Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis Chen, X. Pao, W. Thornton, S. Small, J. Very low permeability soils and rocks may act as actual semi-permeable membranes and also have the potential to swell if they contain smectite clay minerals. This study extends mixture coupling theory for unsaturated, very low permeability swelling rock, based on non-equilibrium dynamics and Biot's elasticity, and develops new advanced coupled mathematical formulations, by including unsaturated chemical osmosis and hydration swelling. Helmholtz free energy has been used to derive the link between solid deformation and multiphase transport. Darcy's law has been extended and the influence of swelling on stress and strain has been included. The mathematical formulation shows that swelling capacity may have a strong influence on the deformation of host rocks (e.g. for nuclear waste disposal) in the chemical osmosis process, which is demonstrated by a numerical simulation of two representative cases. Important engineering applications of this model and analysis are highlighted. © 2016 Elsevier Ltd. All rights reserved. Elsevier Ltd 2016 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964466928&doi=10.1016%2fj.ijengsci.2016.04.010&partnerID=40&md5=10663106f8133b9b923f7be1e1ea2137 Chen, X. and Pao, W. and Thornton, S. and Small, J. (2016) Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis. International Journal of Engineering Science, 104 . pp. 97-109. http://eprints.utp.edu.my/25642/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Very low permeability soils and rocks may act as actual semi-permeable membranes and also have the potential to swell if they contain smectite clay minerals. This study extends mixture coupling theory for unsaturated, very low permeability swelling rock, based on non-equilibrium dynamics and Biot's elasticity, and develops new advanced coupled mathematical formulations, by including unsaturated chemical osmosis and hydration swelling. Helmholtz free energy has been used to derive the link between solid deformation and multiphase transport. Darcy's law has been extended and the influence of swelling on stress and strain has been included. The mathematical formulation shows that swelling capacity may have a strong influence on the deformation of host rocks (e.g. for nuclear waste disposal) in the chemical osmosis process, which is demonstrated by a numerical simulation of two representative cases. Important engineering applications of this model and analysis are highlighted. © 2016 Elsevier Ltd. All rights reserved.
format Article
author Chen, X.
Pao, W.
Thornton, S.
Small, J.
spellingShingle Chen, X.
Pao, W.
Thornton, S.
Small, J.
Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis
author_sort Chen, X.
title Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis
title_short Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis
title_full Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis
title_fullStr Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis
title_full_unstemmed Unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: Hydration swelling and chemical osmosis
title_sort unsaturated hydro-mechanical-chemical constitutive coupled model based on mixture coupling theory: hydration swelling and chemical osmosis
publisher Elsevier Ltd
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964466928&doi=10.1016%2fj.ijengsci.2016.04.010&partnerID=40&md5=10663106f8133b9b923f7be1e1ea2137
http://eprints.utp.edu.my/25642/
_version_ 1741197008972021760
score 11.62408

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